Diffusing the essential oil likely won't help your case of repelling fleas at home. It is also a big non-no if you have pets at home as it increases the chances of your pet accidentally ingesting a substance that could potentially be very harmful for their health.

What oils should I diffuse for fleas?

Use essential oils for cleaning and fragrancing your home to help repel fleas. Citronella, cedar, rosemary, peppermint, lemongrass and lavender can all help to prevent a flea infestation in the house. Consider adding these oils to laundry treatments, home fragrance spray or vacuum cleaner bag.

What can I put in my diffuser to kill fleas?

Atlas cedarwood oil is considered to be the best essential oil for fleas. You can add a few drops of cedar oil into your pet's shampoo or conditioner, or dilute it and apply it directly. You can also use diluted cedar oil in a spray bottle to mist around potential areas of risk.